chemistry

The enthalpy of combustion of carbon to carbon dioxide is -394 kJ according to the equation: C (s) + O2 (g) --> CO2 (g) How many kJ of heat are released when 24.0 g of carbon are burned in an excess of oxygen

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  1. 394 kJ heat released by burning 12 g C; therefore, burning 24 g will release
    394 x (24/12) = ?? kJ.

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